Finding the Fourth Proportional to 30,918.56, 42,667.63 and 17,489.53

Step by Step Solution

1. Step 1: Write the proportion equation
   30,918.56 : 42,667.63 = 17,489.53 : x
2. Step 2: Convert to fraction form
   30,918.56/42,667.63 = 17,489.53/x
3. Step 3: Cross multiply
   30,918.56x = 42,667.63 × 17,489.53
4. Step 4: Simplify right side
   30,918.56x = 746,236,684.52
5. Step 5: Solve for x
   x = 746,236,684.52/30,918.56
6. Step 6: Final answer
   x = 24,135.56